Air-feeding device for furnaces



(No Model.)

T. W. JENKINS.

AIR FEEDING DEVICE FOR FURNACES. No. 357,391. I Patented Feb. 8, 1887..

WITNESSES:

N PETERS, Phcwmhognbhen'wilhinglm, D. C.

rrnn STATES THOMAS \V. JENKINS, OF PHILADELPHIA, PENNSYLVANIA.

AIR- FEEDING DEVlCE FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 357,391, dated February 1887.

Application filed January 4, 1884.

nal section of a portion thereof enlarged. Fig.

3 is a section in line a; m, Fig. 2; Fig. 4 is a section of a portion of Fig. l enlarged.

Similar letters of reference indicate corresponding parts in the several figures.

My invention relates to improvements in the class of blowers or injectors adapted to cause an intermiXture of air and steam and direct the same above or below the grate of a furnace for the purpose of consuming smoke, preventing sparks, and intensifying the heat, the present invention consisting of the construction of the blower or injector, whereby the supply of steam may be regulated, and the blower or injector is compact and simplified.

It also consists of the provision of a valve for the blower or injector, the same being of low pressure and operating automatically to cause an equable supply of steam to said blower or injector.

Referring to the drawings, A represents a pipe leading from a steam-boiler or other steam-supply and connected with a blower or injector, B, the latter being in communication with a conveyingpipe, O, which leads into a furnace, said injector having for its object the union .of air and steam, producing a vapor which is directed into the furnace through the pipe 0 and discharged therein, either below the grate, as shown in Fig. 1, wherebyit comminglcs with the fuel and is consumed therewith, or above the grate, whereby it conimingles with the products of combustion and is consumed therewith. In either case or combination thereof the heat is intensified, the smoke being consumed, sparks prevented, and the consumption of fuel vastly reduced.

The injector B consists of a pipe or tube, B, open at both ends, and a surrounding annulus, B, which is perforated on its inner face, as at a, the perforations opening into the tube Serial No. 116,444. (No model.) a.

B and facing the pipe 0. Connected with the annulus is the pipe A, whereby steam is admitted to said annulus, the same escaping through the perforations a into the tube B, it being seen that by the action of the steam air is forcibly drawn into the tube B and intermingled with the steam, thus producing the vapor, as hereinbefore referred to.

The annulus may be drilled or cast with as many perforations as are required relatively to the amount of steam to be injected into the tube B, and said amount may also be adjusted by plugging or otherwise closing some of said perforations. Furthermore, the an nulus is cast with the tube, thus producing a compact, strong, inexpensive, and simple structure, and as a joint between the annulus and tube is avoided there is no leakage at said parts.

The conveying-pipe C may be readily fitted tube B, and said pipe and tube may be of tapering or other form, as desired.

D represents a low-pressure valve, which is connected with the pipe A intermediate of the steam-supply, and the injector B, and consists of a shell, E, a downwardly-closing valve, F, valve-seat G, valve-stern H, and spring J, the valve, due to the action of said spring, being held open in its normal position and closing by superior pressure of steam overcoming said spring.

It will be seen that steam is admitted through the pipe A and valve D to the annulus. the valve is forced toward its seat, and as the pressure decreases the valve again leaves its seat, and thus an equable supply of steam is automatically maintained in the injector.

In order to adjust the valve to the desired supply of steam the stem H is passed freely through a plug, K, which is screwed to the bottom of the shell E, thespring J encircling the stem and bearing against the plug K and a shoulder or stop on the stem. By rotating said plug the valve may be raised or lowered, thus increasing or decreasing its amount of travel, and consequently varying the tension of the spring.

Having thus described my invention, what I claim as new, and desire to secure by Let ters Patent, i sto and removed from the discharge end of the Should the pressure of steam increase.

Adevice of the character described, consistmaintain a uniform current of steam into said iug of a blower having a surrounding annulus blower, all substantially as and for the purpose with openings on its inner side toward the conset forth.

veying-pipe O, the conveying-pipe O, a steam- THOS. W. JENKINS. 5 inlet leading froma steam-boiler into said ann'u- Witnesses:

Ins, and provided with a spring-Valve adapted J OHN A. WIEDERsHEIM,

to automatically either open or close, so as to A. P. GRANT.- 

